Vehicle-spring.



PATENTED 00T. 24, 1905.

A. HERZ. VEHICLE SPRING.

APPLIOATION FILED 33.14.1905.

ADGLF HERZ, OF VIENNA, AUSTRIA-HUNGARY.

VEHICLE-SPRING.

Specification of Letters Patent.

latented Oct. 24, 1905.

Application led April 14, 1905. Serial No. 255,533.

,To all '1l/hom it 17e/ty concern:

Be it known that l, ADOLF HERZ, a subject of the Emperor ofAustria-Hungary, and a resident of Vienna, Austria-Hungary, haveinvented a new and useful Vehicle-Spring, of which the following is aspecification.

The object of my invention is to provide a device for use in connectionwith vehicles whereby the vehicle-spring may be permitted to becompressed under one degree of friction and permitted to expand underanother degree of friction, thereby preventing undue vibration of thevehicle-body when thle vehicle-wheels are subjected to severe Jo ts.

A practical embodiment of my invention is represented in theaccompanying drawings, in which- Figure 1 represents my improvedantivibration device in side elevation, so much of a vehicle-body frame,axle, and spring being shown as will give a clear understanding of thelocation of the device with respect to the same. Fig. 2 is an enlargedview of a portion of the device in side elevation, the protecting-platebeing broken away to more clearly illustrate the roller-clutch; and Fig.3 is a central transverse section taken in the plane of the line A A ofFig. 2 looking in the direction of the arrows.

The vehicle-spring 1 is herein represented as of the well-kn ownsemi-elliptical form, its ends being connected to the body-frame 2 bythe usual shackles 3 4. The support for the spring (in the presentinstance the axle-bar) is denoted by 5.

My improved antivibration device comprises, broadly, threefrictionallyengaged parts, (shown herein as a middle disk 6 and twoouter disks 7 and 8,) the disk S forming the inner member of aroller-clutch, the outer member 9 of which forms a permanent part of themiddle disk 6. I have shown in the accompanying drawings the outer ringmember 9 of the clutch as permanently secured to one 'face of the middledisk 6 by suitable fastening-screws 10. An annular series of rollers 11are interposed between the clutch members 8 and 9, the clutch member 9having a cylindrical interior wall and the clutch member 8 having aplurality of cam-surfaces so arranged that when the clutch member 8 isrotated in one direction it will be released from the clutch member 9and when rotated in the opposite direction it will be clutched thereto.The clutch member 8 is mounted to rotate on a bolt 12, which projectsfrom one face of the middle frictiondisk 6. A washer 13, of somesuitable frictional material-such, for instance, as leather-isinterposed between. the disks 6 and 8. These two disks are brought intothe desired frictional engagement with each other, so as to retardthefreverse movement of the disk 8 when unlocked from the disk 9, asfollows: A nut 14 has a screw-threaded engagement with the end of thebolt 12, and a washer 15, of frictional material-such, for instance, asleatherwis interposed between the inner face of the nut and the outerface of the disk 8. As the nut is screwed inwardly it will be seen thatit will increase the frictional en agement between the disks 6 and 8.

The bt 16 projects from the other face of the disk 6 in alinement withthe bolt 12, and on this bolt I mount the disk 7. A washer 17, offrictional material-such, for instance, as leather-is interposed betweenthe adjacent faces of the disks 6 and 7. The amount of friction betweenthese two disks may be accurately regulated by the following adjustablemeans: A nut 1S has a screwthreaded engagement with the free end of thebolt 16, and between this nut and the outer face of the disk 7 is placeda washer 19, of some suitable frictional m aterial-such, for instance,as leather. As the nut 18 is screwed inwardly it will increase thefrictional engagement between the disks 6 and 7.

The disk S is provided with an arm 20, which is pivoted to thebody-frame 2 or other part supportedby the spring, as shown at 21. Theinner end of this arm 20 is permanently secured to the disk 8 byproviding the arm with a ring 22, which surrounds the nut 14 and issecured to the outer face of the disk 8 by screws 23.

The friction-disk 7 is provided with an arm 24, which is pivoted to thespring-supportin the present instance the axle-bar 5, as shown at 25.This arm 24 is provided with a ring 26. which is secured to the outerface of the disk 7, near its periphery, by suitable screws 27.

A protecting-plate for the clutch may be secured to the outer face ofthe disk 8, which plate in the present instance consists of two members28 and 29, secured to the outer face of the disk 8 by suitable screws30. This plate overlaps the outer face of the outer clutch member 9 andserves to retain the rollers in position.

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The device is so attached to the vehicle that the arms will be at thedesired angle with respect to each other at that side of the clutchwhich will permit the arms to be swung toward each other with the clutchunlocked and the desired amount of friction between the disks 8 and 6.This arrangement will permit the device to retard the eXpansion of thespring with a predetermined degree lof friction between the disks 6 and7 when the disks 6 and 8 are locked together by the clutch. By thisarrangement l am enabled to retard the compression of the spring withone degree of friction and to retard the expansion of the spring at agreater degree of friction, thus not only strengthening the spring as tocompression, but also preventing undue jumping of the Vehiclebody whenthe traction-wheels are subjected to a jolt or other severe strain.

l/Vhat I claim as my invention isl. The combination with avehicle-spring, of means for retarding the compression of the springwith one degree of friction and another means for retarding theexpansion of the spring under another degree of friction.

2. The combination with a vehicle-spring, of means for retarding thecompression of the spring with a lesser degree of friction and anothermeans for retarding the expansion of the spring with a greater degree offriction.

3. The combination with a vehicle-spring,

of means for retarding the compression of the spring with one degree offriction and the expansion of the spring with another degree of frictioncomprising two frictionally-enn gaged parts, means for adjusting theirfricm tional engagement, a third part, means for adjusting itsfrictional engagement with one of the two frictionally-engaged parts anda clutch interposed between the third part and one of thefrictionally-engaged parts for locking and releasing the third partaccording to the direction of its movement.

4. The combination with a vehiclespring, of a friction-disk havingoppositelyeXtended bolts, a second disk rotatably mounted on one of thebolts and means engaging the bolt for adjusting the frictionalengagement of the two disks, a third disk rotatably mounted on the otherbolt, means engaging the bolt for adjusting the friction between thefirst and last named disks, and a roller-clutch interposed between thesaid first and last named disks.

In testimony that I claim the foregoing as my invention l have signed myname, in presence of two witnesses, this 13th day of March, 1905.

ADOLF HERZ.

Vitnesses 1 FREDK. HAYNEs, C. S. SUNDGREN.

